A farmer needs to decide which type of corn he wants to plant. To decide, he...

A farmer needs to decide which type of corn he wants to plant. To decide, he plants two small test areas. After the corn has grown he compares the lengths of the cobs. He looks at 35 cobs of Type A, which had an average length of 6.3 inches with a variance of 1. He looks at 30 cobs of Type B, which had an average length of 5.9 with a variance of 1.3. Calculate a 95% confidence interval for the difference in average lengths between Type A and Type B.

(-.041, 0.841)

(-0.126, 0.926)

(-0.029, 0.692)

(0.316, 0.474)

Expert Solution

orchestra answered 2 years ago

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